Heating apparatus



FIG. 1 is a front perspective view showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is the opposite side elevation view of FIG. 5; and,

FIG. 7 is a top plan view thereof.

The broken lines shown in the drawings identify in phantom environmental structure or boundaries that are not claimed as part of the design to be patented.

FIGS. 2-7 are shown on an enlarged scale. 

The ornamental design for a heating apparatus, as shown and described. 